Former Real Madrid player Kaka has urged supporters at the Estadio Santiago Bernabeu to stop whistling Cristiano Ronaldo.

This season Ronaldo has moved past Blancos legend Raul Gonzalez to becoming the club's all-time top scorer, while he is also by far the current team's leading marksman with 28 goals in 30 La Liga games and 13 strikes in eight matches so far in the Champions League.

However, some Madrid fans and pundits say that many of these goals have come against supposed weaker opponents, and the team has struggled in the bigger games -- leading to Ronaldo coming under the microscope.

"Cristiano is a great player, and after all he has given for Real Madrid, I would like to see the fans have more respect for him," Kaka said. "To listen to whistles against Cristiano sometimes is not good, after all he has done for this club."

Dealing with such demanding supporters is something many big players had been forced to accept, said Kaka, who himself became unpopular with some sections of the support during an injury-plagued spell at the club between 2009 and 2013.

"When you go to play for Real Madrid you already know this, it is not just with Cristiano," he said. "It happened with [Zinedine] Zidane, with Raul, with [Iker] Casillas... It is always like that.

"When you go to Real Madrid you already know you will find this type of fan. The only thing I would like to see is more recognition for what Cristiano has done there, which is so much."

It has led to the suggestion that Ronaldo could leave the Bernabeu this summer, with potential destinations including Paris Saint-Germain, his former club Manchester United and MLS in the United States.

Current Orlando City player Kaka said that Ronaldo would be better off staying at the Bernabeu.

"I would recommend that [Ronaldo] stays in Madrid," Kaka said. "Many things happen there, on both sides. If things don't go well, it can get very big, but when they do go well it's also very big.

"Much of what happens with Cristiano, and the name he has today, is because he plays at Real Madrid."